A booming economy increases the income of the typical buyer of wireless earbuds ​(this

is a normal good​).
Part 12
A.
increase in demand.
B.
increase in quantity demanded.
C.
decrease in demand.
D.
decrease in quantity demanded.

A. increase in demand.

Consumers of wireless earbuds anticipate that the price of this good will decline in the future.

Part 15
A.
increase in demand.
B.
increase in quantity demanded.
C.
decrease in demand.
D.
decrease in quantity demanded.

B. increase in quantity demanded.

In this situation, a booming economy is likely to increase the income of the typical buyer of wireless earbuds. This means that people will have more disposable income to spend on non-essential goods, such as wireless earbuds. As a result, we can expect that the demand for wireless earbuds will increase. Therefore, the correct answer is A. increase in demand.